Automatic priming device



J. F. READ. AUTOMATIC PRIM'ING DEVICE. APPLICATION FILED JULYIO, I919.

1,411,183. Patented Mar- 28, 1922.

" Antonino mmrm DEVICE.

I plicantsfiled- 11 110;

To all whom it may concern;

r citizen of the United Priming Device'si by "delivering "a primingcharge to theengine intake at starting. This is -not on-lytadvan the acconipanying drawing in which:

Be t knownthat L; Jasm n 5 R AD; a

anduseful Im rovement -Automa tic I I ofwhich thekfollowing is a specification. Q f

This inventionrelates to automatic pri'n'i ing devices for gas eng' ines and 'more par ticul'ajrly- "for the as-en ines of "automobiles; I The starting of a ga-s' engine is fecilitated tageous Where the eng ine is started by hand crank but also where the engine assented by motor cranking-for in such a case the motor and the battery will be sa ved considerable wear and tear-1f thestarting is rendered an easy matter; The difiicultyghoii evem withhund 3 priming devices is thatthe rich mix E turei-is liable to be delivered too longsoithat start; but the startingwill', in fact, be retarded.

One of the objects of this inventiomtherefore,- is'to provide at primer for gas engines Whichis adapted to autoinutica-llydeliver a priming charge when i the engine is started, as distinguished from a continuously flowing charge'of rich mixturecut off by' hand;- Further Iobjects willj'appear from the detail description .gtarken in connection with F igurel is' a side elevationpartlyin section of .a part of an automobile,"its'engine and the fuel supply"tank; showing the" primer embodying this invention; i

Figure 52. 'ssubstaxitirlly-:full size front elevationiof the priming device; I Figure 3 -is-a view-similar to Figure -2, but

I showingthe partsina different position;

-- 111'6-2; and

Figure 4 is a section on the lined-45 Fig- Figure 5 is a detail section showingvtheautomaticcut'oifrValves 1' ji Referring to: the accompanying drawing andmore particularly to Figure 1, 1 designatesi avgas engine-of well known construc- I tion which is mounted on the chassis=-2 of an automobile, the engine being: provided with an intakecm'anifold 3 to W-lnchis connected. a carburetor 4 and with an exhaust mant; fold f5, 1 The chassis has mounted thereon a fuel tank 6 which is,' in this 'cz se mounted under'thefront seat T, :ind'thereis also provided the usualautomobile dash 8' which States; 'andresi'ding at 1 St. Louis hl ssouriilni ve invented new is eif Serial 1N6. 309,3 5?

uni-y constitute the,instrument board :es'is cra 10, although it may be provided with "a motor operated starter; The parts so far described may be'fofus'ual construction and further detail descriptio'lr'thereof is, there-f fore',-unnecessary." I I I The priming device embodying this inQVentionis adapted to'bemountedon theda sh 8 so as to be in'full View of thedriver'. 4 It comprises a base'plate ll which'has mounted thereon a-flanged ring 12, the flange 13 of which extends overvthe plate'fland has an threaded connection therewith att the outer I circumference as shown at 14. gasket '15 isinterposed' so as to form a tight'joint). A knurled ring'16' is threaded a Henge-18 forclarhpin'g a glass" plate 19 against the ring 12, a gaSketQO being inter-- posed to forme tight joint: Thelring flange ing or soldering the same in place." The bore of the cylinder has anout1et'24'con-* nectin with a coupling 25 which has fluid t'ight' joint connection with the base plate, The inner end of the outlet 24 a i cone-shaped seat 26 while adjacent the'sez t I is a perforation 27 opening into fthe space in the casing. A pipe 28fisjattached to theside of the'cylinder opening therein at 29' and has its lower end extending downwardly piston has a stem 31 passing through a plug 7 32 threaded into" the endpf the cylinder and mountedon its-lower endis a corkffloat" 33."In"order to sec'urethis fl'oat imposition;

I onto an enlarged v I annular shoulder 1'7-of the ring 12 and has the engmewill not only tail to properly v v 8 and plete 11 'are' perforated as shown-M21 f i to r'ecelve screws {22 for mounting the device on the dash 8. There 1s thus formed a'case I I the base plate 11 acylinder 23,?fth1s cylinder being secured in position I to nearly the bottom of the casing. Movably mounted in the cylinder ise piston 30. This the end of the stem 31 maybe-threaded as' i I shown at 341. The piston 30 is in the form of :vmetallic cup to whichthe stem *31is suitably secured,- and in this cup is' afiller of I cork projecting cup and" substantially flush circumferem" 0 axially beyond the 36 with an intake manifold, the connection being made by the usual form of couplings and by aplug37 screwed intothe intake manifold. Thelower end of the casing has alike coupling 38 connected by a pipe 39 with] the fuel tank 6 which as shown is located below the 1 level ofthe ,device onthe dash. The coupling has a perforation 4.0 extending therethrough and communicating with the atmosphere fora purpose to be hereinafter described.

' jil ssuming the parts to be in the position shown in Figures 2; and4, in which the easa positlon for priming theengine when the as hereinafter described, is empty and in which'the float 33 rests upon the bottom of the reservoir, at which time, the piston will be in fl lJOSltlOn to uncovertheports or the openings 27 and 29, the device willnow be in same is'started. ltwill be noted, in this connection, that'the port 29 leading to the" pipe 28 is larger than'the'port 27 leading to the interior 'of the casing or reservoir.

'Furtheri'nore, the portor opening 40 leading directly to the fuelpipe 36 connected to the intake is very small,

. smaller than the port 27.

When the engine isstarted byhand or by x I motor,the pistons duringtheirintake-stroke will cause an upward flow of the g through the carburetor and intake manifold intothe engine cylinders. This flow of the gases past the outlet of the pipe 36 in theintake manifold will'cause by induction, a reduction ofthe pressure below atmospheric pressure inside of thep1pe- 36. T1115 w ll cause a reduction of pressure inside of'the cylinder 23, and since the cylinder is in communication with the interior of thej'casin'g or reservoir through the ports 27 and'28, there will be caused areduction of pressure inside of this casing or reservoir. Of course, there is a s llghtJnflO'W of atmospher c anthrough the portflO into the pipe 36, but this is not Asthepressure' inside of the cylinder and .reservoirfalls below atmospheric pressure,

' the fuel-will rise in the pipe cumulate 1n the" reservoir.

7 As soon as the levelof the fuel reaches the inlet to the pipe 28, dueto the fact that this inlet is now closed by. the fuel and due to the fact that the port. 27 is smaller than the port 29, the

pressure inside of the cylinder will drop below, the pressure inside-of the reservoir; ac-

I V 23 and--wil.l.flowthrough the cylinder and its outlet 24:- .into thepipe 36 andinto the incordingly, the fuel will now rise in the pipe takemanifold; This flow of the fuel is acingq'vhich forms an'auxiliary fuel reservoir] that is, considerablyases' 39 and will 1 will. become atomized and slightly carbureted before passing into the intake manifold and so that'the charge is thrown in an atomized condition into the intake manifold where it becomes further atomized and as'it is discharged into the flow of'gases wardly through the intake manifold, the result is thata rich mixture will be discharged into the engine cylinders so as to prime the engine when starting.- As v thisoperati'on companied by a flow of air so that the fuel proceeds, the level ofthe fuelj will "risjein the reservoir carrying the 'float'with it; and I tlierefore,.mov1ng the piston on it upwardly.

This piston passes successively and closes the ports 29 and 27 until the facingj3'5 engages theseat126 at which time;, -both ports Y i 29 and 27 ;wil1 be closed andthe outlet will i be completely closed from communication with the cylinder and the reservoir. Thev how of the rich mixture to. the intake manhfoldwilhtherefore', cease. In View, of the f fact, however, that there will be a rich minture or atomized fuel insideof the pipe 136 when the piston. closes the outlet 24,;the port cause this. rich mixture in the pipe 36 to-lbe fully dischargedinto the intake-manifold. Thereafter, the supplyof rich mixtureto' the engine will beentirely cutoff and the enlOis provided so that the inflow ,of airiwill again stops; atthis time, atn10spheric-pres-' 3 sure isagain established in the pipe'36yand accordingly in the cylinder and the reservoir; consequently, the level of the liquidwill drop insideof the reservoir, causing the float and its attached pistons to drop and assume the normalp ositions shown in Figure'sQ and 4, with the ports 29 and27; againopened to: the interiorof the reservoir andrthe parts are then againin position for operation; If it should happen'that the engine back j tires, which is usually caused by too leziji 'a mixture, at that time, atmosphericpressure suflicient toprevent a reduction of the pressure insideof the'cylinder and the reservoir.

will "not only be establishediinlthe pipe but rather increased; accordingly,"the piston-is forced down momentarily, thereby. openingthe-ports 29 and 27 and consequently causing.

It will,therefore, be'seenthat this inven f is tion accomplishes itsiobjects- .fwhen the en cally by the flow of the gases'at the engine ,gine is started, the device operatesautomati 7 to automatically deliver a limitedzpriniing charge fromthe main'supply to th'ell'engine- I when the' engine is started; and the flow of:

the priming fuel isterniinated after a. pre-.

determined quantity'o'f priming fuel is de'-.

1 Ill) liverecl or after a predetermined ifuel flow.

Accordingly, the device' is entirely I auto matic in its: 'action inz'xthat only a limited priming i'cha rge is ai'itorn'atically' dolivered as distinguisheiil from a jco'iitinuouflow- {whit-h v -mustqbe cut offimanually by the d rivenfii Not p after: theiengine has'stamed.

only is this :priming .cha -rgefdeliv ered automatically when-"the engine is started, but-"1 it- I is also delivered during abnormal OPBIPMZIDH- of the engine as :when ;th e "engine: back fires as he'reto fore idescri'bed'. g The deviceis' so constructed that it-icanwbepl aceid on the dash of the ai'ltomob-ilein full: view of'the driver and on faccount of the transparent plate, the

operation can not only be observed but-it ,can be observed whetherthere'isin' fact fuel in v thefueltank I It is obtiousthat various changes may he made: in the details of construction without departing from the spiritof' this invention 1 it is, therefore, to be understood that this in vention is"notto;berlimitedqto'the specific constructi'onshown and described. 7 'Havingzthus described the invention',-what is claimedu'isz: 2

1.. A primer -for'igas engines, comprising. asource of fuel supply, means fo'r sup-i plyingvfuel to'the engine; and I1neansf=cooperating therewith includingan auxiliary fuel reservoir in continuous communication with said supply and operating :upon'ithe fioW 1 of V gases at i the engine; adapted to automatically deliver a lmeasuredfpriming 7 charge when the engine is started-r 2. i A'prlmer ffor gas'en-gines, i COlIlPIlSlIlg a source of fuel supplynmeansfora sup-' plying fuel to the engine, and means cooperating: therewith including an auxiliary fuel reservoir in continuous communication with said supply; and operating upon the flow of gases at the engine, adapted to automatically cause a flow of priming'fuel to the engine and thereafter terminate the flow. I c

3, A. primer for gas engines, comprising a source of fuel supply, means for supplying fuel to the engine, andrmeans cooperating therewith including an auxiliary fuel reservoir in continuous communication with said supply, and operating uponthe flow of gases at the engine, adapted to automatically delivera predetermined quantity of priming fuel to the engine.

4. A primer for gas engines, comprising a source of fuel supply, means'for supplying fuel to the engine, and means cooperating therewith including an auxiliary fuel reservoir in continuous communication with said supply, and operating upon the flow of gases at the engine, adapted to automatically ,deliver priming fuel to. the I,

engine'for a predetermined period.

5. A primer forgas' engines, comprising a source of fuel supply, means for supplying fuel to the engine, and means cooperating therewith including janauziiliary '6. A "primer for gas engines: comprising 1 a'souroe of-fuel supply, a-fuel pipe adaptedfor conneetion to" theengine intake, means including an auxiliary :fueli reservoir incon J ti-nuous c'ommunicationnwith said supply. and operatinggupon the flow of gases in the I intake iadapted to automaticallly' deliver primingfifuel to said:-pipe'and= means for automatically termi'natlng' fuel flow:

7. A primer forgas'engimsg comprising matic means including an auxiliary fuel res ervoir in continuous rcommunication with I a source'of fuelgsupply, a flict-pipe adapted 7 r for fcon'ne'ction to the engineintake; auto:

said supply and operating upon thef fiow of- V gases' in the intake adapted to deliver: prim 5 ing fuel to said pipe, and means operatin after an interval adapted to terminate" the fue1"fiow.="- I I 8. A primerforgasengines, comprising, a 5 fuel :pipe" adapted. for connection to the engine intake, automatic meansfoperating upon the flow ofgases: in the intake adapted to deliver priming v:fu'el to 3 said pipeg and means -1 operating rafter a predetermined flow adaptedto terminate the fuelifiow.

9. :A primer for" gas engines, comprising, a fuel reservoir-{a pipe connected-thereto and arranged-for connection,to the engine'- intake, 5 together". with means: including 1 auxiliary fuel: reservoir in' continuous com munication with said supply, adapted upon the flow of gases in the intake, to automatically deliver a measured priming chargevto the intake when the engine is started. j 10. A primer for gas engines, comprisr ing, a fuel reservoir,adapted for permanent connection to the source of fuel, a pipe connected to said reservolr and arranged for connection to the engine intake, together with means adapted upon the flow of the gases in the intake to automatically deliver a measured priming charge to the intake when the engine is started.

11. A primer for gas engines, comprising, a fuel reservoir, adapted for permanent connection to the source of fuel, a pipe connected to said reservoir and arranged for connection to' the engine intake, together with means adapted upon the flow. of'the gases in the intake to automatically'cause a flow of fuel from the source to said reservoir and deliver a measured priming charge from said reservoir to the intake whenthe' engine is started;

12. A primer for gas engines, compris- 7 ing, a fuel reservoir arranged for permanent connection to a fuel source, a pipe connected tosaid'reservoir and-l arranged for con-.=

nection into the. engine; intake, automatic means adapted upon the flowcof gases in the intake to,del1ver primin fuel to the intake,fand means adaptedafter a flow intervalto automatically terminate the flow.

13. A primer, 'for gasengines, comprising, a fuel reservoir arranged for-connectionto a fuel source, a pipe connected to said reservoir and arranged for connection to v the engine intake, automatic mea'ns adaptedupon-theflow of; gases in the in-:

take, to cause afiow. oflfuel from the source tosaul reservoir and. to deliver priming fuel from said reservoirlto the intake, and

means adapted after a flow interval to automatically terminate the; flow.;

;14. A (primer for gas engines, comprise ing, a fuel reservoir arranged for connection toa'fuel source, a pipe connected to said reservoir and-arranged forconnection to the engine intake, automatic means adapted:

' upon the "-flow-of gases in the intake, to

v deliver, primingzfuel toy'the intake while Mthei fuel from the source accumulates in the reservoir, and means operatingafteraccu mulation, of: fuel '111 said reservoir adapted to. automatically terminate the deliveryl of the plfimingsfuelu connectionlto' the fuel supply, a pipe connecting saidldevice to. the intake, and means 7 in said device, adapted to automatically deliver :ameasured priming charge to intake when the-engine is started.

gases at theengine,,to ride iver :a supply of the 16. A primer for gas fengines, having a' main source "of. fuel supply, comprising, an M auxiliary fuel reservo r in continuous'com-c municatlon with the; main source; auto- Illa-m0 means operatmg u n the fiowof fuel to said reservoir, 'rand 'to deliver a measured priming charge from said reser-z o voir to the engine 17. A primer forges engines, h'aving a main, source of fuel supp lyyicom'prismg, automatic means, operating, upon the flow of gases-at the engine,=adapted to: deliver a measured priming charge of fuel from-themain source tothe engines 18. A primer for as eng1nes, -l1a-v1ng a main source of fue supply, comprising, 5

automatic means, operating upon thelfiow of gases at the engine,- and including'an' aux-L;

'iliary fuel reservoir in conti'nuous' communi cation: with the i main source, adapted to,

deliver .a measured primingcharge "of fuel from the 'main source: to the engine.

.19.' A 'primer for gas engines, having a auxiliary fuel reservoir in continuous communication with-themain source,iaut0mat1c. meansoperating upon the flow. o fgases at the engine, to deliverwa supply.;of=r fuel (:05 7 said" reservoir, and :means operating-in accordance with the levelof the fuel in: said reservoir, adapted to ideliveru-a measuredi'n') priming charge offuelfrom said reservoir to the engine.

In testimony whereof I afiix my signature ,main source of fuel supply, comprising, an. 

